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Full Discussion: String comparison tutorial not helpful
Top Forums Shell Programming and Scripting String comparison tutorial not helpful Post 302558273 by johnwdavis on Friday 23rd of September 2011 07:47:51 AM
Old 09-23-2011
String comparison tutorial not helpful
I have a bash string comparison which is not working, looked for help, and found this.

HTML Code:
= 
is equal to
if [ "$a" = "$b" ]
 
[IMG]http://www.tldp.org/LDP/abs/images/caution.gif[/IMG]Note the whitespace framing the =.
if [ "$a"="$b" ] is not equivalent to the above.
</DIV>
I do not find this to be helpful because I am asked to note the whitespace framing the = but am not told what its significance is.

The code which is not working is:

Code:
  if ["$TWI_IP" = "$TWJ_IP"]
                 then
                     PRO=1
                      echo we got an EQUAL!!!!!
                 else
                      echo we did not get an equal even though they are equal
                 fi

The string variables TWI_IP and TWJ_IP have equal contents but this code will always take the else branch.
 

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